Anti-single lifting ring accident prompting device

Abstract

The invention discloses an anti-single lifting ring accident prompting device which is characterized in that signal transmitters are embedded in two elevator pin holes; a circuit consisting of signal receivers and a prompting sound box is mounted in a driller console. The signal transmitters embedded in the left and right elevator pin holes are once interfered to remotely control the on and off states of the prompting sound box when elevator pins are pulled out from or inserted into elevator lug pin holes, namely when the elevator pins are pulled out, a power supply of the prompting sound box is turned off and the prompting sound box does not make a sound, and after left and right lifting rings are hung in elevator lugs and the left and right elevator pins are inserted into the elevator pin holes, the power supply of the prompting sound box is turned on and the prompting sound box makes a safety operation prompting sound. According to the principle, a driller can be timely prompted whether to be hung with a low-speed clutch for safety operation, and the single lifting ring accident is avoided. The anti-single lifting ring accident prompting device starts working when the power supply is turned on before the pullout process of double elevators.

Description

technical field [0001] The invention relates to the prevention of single-ring accidents during oil drilling, workover, tripping, casing tripping and other pipe string operations. Background technique [0002] During oil drilling and workover with double elevators, the sight of the driller was blocked by the workers at the wellhead position, and the workers at the position had not hung both lifting rings into the elevator ears, and did not make gestures or prompt signals. At this time, the driller may directly engage the low-speed clutch to pull out the drill, and lift the elevator hanging the pipe string in the well with a single lifting ring. Because the elevator is under one-way force, the hoisted pipe string will be bent and broken under its own weight. Finally, there is a great potential safety hazard in the single-ring accident that causes the pipe string to fall into the well or injures personnel and equipment. Contents of the invention [0003] Aiming at the hidden...

AI Technical Summary

Problems solved by technology

[0002] During oil drilling and workover with double elevators, the sight of the driller was blocked by the workers at the wellhead position, and the workers at the position had not hung both lifting rings into the elevator ears, and did not make gestures or prompt signals. At this time, the driller may directly engage the low-speed clutch to pull out the drill, and lift the elevator hanging the pipe string in the well with a single lifting ring. Because the elevator is under one-way force, the hoisted pipe string will be bent and broken under its own weight. There is a great potential safety hazard in the single ring accident that causes the pipe string to fall into the well or injures personnel and equipment.

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